/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Header File for Altera SPI Driver.
 */
#ifndef __LINUX_SPI_ALTERA_H
#define __LINUX_SPI_ALTERA_H

#include <linux/interrupt.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include <linux/types.h>

#define ALTERA_SPI_MAX_CS               32

/**
 * struct altera_spi_platform_data - Platform data of the Altera SPI driver
 * @mode_bits:          Mode bits of SPI host.
 * @num_chipselect:     Number of chipselects.
 * @bits_per_word_mask: bitmask of supported bits_per_word for transfers.
 * @num_devices:        Number of devices that shall be added when the driver
 *                      is probed.
 * @devices:            The devices to add.
 */
struct altera_spi_platform_data {
        u16                             mode_bits;
        u16                             num_chipselect;
        u32                             bits_per_word_mask;
        u16                             num_devices;
        struct spi_board_info           *devices;
};

struct altera_spi {
        int irq;
        int len;
        int count;
        int bytes_per_word;
        u32 imr;

        /* data buffers */
        const unsigned char *tx;
        unsigned char *rx;

        struct regmap *regmap;
        u32 regoff;
        struct device *dev;
};

extern irqreturn_t altera_spi_irq(int irq, void *dev);
extern void altera_spi_init_host(struct spi_controller *host);
#endif /* __LINUX_SPI_ALTERA_H */